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4 years ago

What's the scientific notation of 0.000000109

1 answer:

5 0

0.000000109 in scientific notation will look as it follows:

1.09 * 10^-7

or
<span>
1.09 E-7

It's the same as 1.09 * (-10000000)

I hope it'll give you some clue of scientific notation with decimals.</span>

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You have been asked to build a scale model of a restaurant out of bottle caps. The restaurant is 20 feet tall. Your scale is 2.4

Amanda [17]

Answer:

$40\ bottle\ caps$

Step-by-step explanation:

we know that

The scale is $\frac{2.4}{1}\ \frac{cm}{ft}$

That means

2.4 cm in the model represent 1 foot in the real

In this problem

The restaurant is 20 feet tall

Find the height of the model

Multiply the actual height of the restaurant by the scale 2.4

$20\ ft=20(2.4)=48\ cm$

A bottle cap is 1.2 cm tall

To find out the number of bottle caps divide the height of the model by 1.2

$\frac{48}{1.2}= 40\ bottle\ caps$

8 0

3 years ago

At 8am,Ming Wei started travelling from Town A to Town B.At 8:40am, Ali started travelling from Town B to Town A.Mingwei's speed

Vesnalui [34]

Let's write some equations.

Mingwei's distance from Town A after $x$ hours from 8:00 is $45x$ .

Ali's distance from Town B after $x$ hours is $30x-20$ , since he doesn't start walking for 40 minutes.

When Mingwei's distance is twice Ali's, they've met up (since their distance from Town A is twice their distance from Town B).

So, this gives $45x=60x-40$ , so $15x=40$ , so $x=\frac{40}{15} = \frac{8}{3}$ , so the time is 10:40.

After $\frac83$ hours, Mingwei has traveled $45 * 8 / 3 = 120$ kilometers while Ali has traveled sixty, so the distance between the towns is $180$ kilometers.

7 0

3 years ago

What is the velocity of a car that is traveling north 290 kilometers in 5 hours?

Maksim231197 [3]

Answer:

Step-by-step Explanation: 290 / 5 = 58

3 0

3 years ago

Depreciation is the decrease in value of an item. Three years ago, Aaron bought a computer for $930. The computer is now worth $

Umnica [9.8K]

Answer:

$120

Step-by-step explanation:

930-570=360 (Price difference in 3 years)

360 divided by 3= 120 (Price difference for each of the 3 years)

7 0

3 years ago

What should be subtracted from 3x to Gate 3 X - 2y

castortr0y [4]

Answer:

3x-2y

Step-by-step explanation:

2y must be subracted

3 0

3 years ago